Acoustic‐Vibration Coupling Characteristics of Composite Plate Structure with Acoustic Black Hole and Acoustic Coating

Acoustic black hole (ABH) has gained significant attention in the scientific community as a passive, effective, and lightweight solution for controlling noise induced by structural vibrations. This article introduces ABH technology into composite plate structure, resulting in the design of an ABH composite plate. A finite element model of the free‐space acoustic field is developed to evaluate this structure's acoustic and vibrational properties. Results indicate that the ABH acoustic coating damping layer composite plate (ABH + AC + DL) demonstrates excellent vibration attenuation above the cutoff frequency. The modal analysis offers a multiperspective explanation of the normal layered modes in the ABH + AC + DL composite plate, shedding light on the intrinsic mechanisms responsible for its high damping performance. The study further investigates the impact of these layered modes on structural sound radiation, providing insights into the noise reduction mechanisms of the ABH composite plate. Additionally, the research explores the sound radiation characteristics of ABH composite plates in different media, demonstrating the effectiveness of the ABH structure in water and broadening the potential application scenarios for these composite plate structures.